Moonraker wrote:
I read recently that LEDs in cars are not as efficient as touted, it
seems they need cooling to work efficiently, so that may apply to the
home as well.

The benefits of LEDs on vehicles are the long life and resistance to
vibration. They also normally fail in a manner that leaves at least some
light being generated by the unit, which is safer than the all or
nothing when a filament lamp fails.

The efficiency savings for mobile use aren't worth bothering about
except for applications like battery powered cycle lights or torches, as
the power used by the lighting on a car is a small percentage of the
total power used to move it. At 30mph on a flat road, the absolute
maximum total lighting load on most cars, including headlamps and
foglamps, is less than 400 watts, as against ten kilowatts or more being
used to overcome rolling and air resistance.

LEDS in fixed installations are noticeably more efficient than filament
bulbs, as they use a switched mode supply, with a total comsumption of
about 10% or 15% that of the filament bulbs for the same light output.

--
Tciao for Now!

John.